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Locks

© viadonau/Pilo Pichler

Locks on the Danube

There are a total of 18 river power plants on the Danube waterway (from Kelheim to Sulina). These generate energy by utilising the gradient of the river and the accumulation of water behind the dam. Locks are used to enable vessels to overcome the resulting differences in height along the river and can consist of one or more (usually two) chambers. Fourteen of the eighteen locks on the Danube have two lock chambers, thus enabling the simultaneous locking of vessels travelling upstream and downstream.

Due to the steep gradient of the Upper Danube between Kelheim and Gönyu, there are a total of sixteen power plants with locks. On the Middle and Lower Danube there are only two locks. These are situated at the Iron Gates, a gorge forged by the Danube through the Carpathians, which forms the border between Romania and Serbia. These two locks are also the largest on the Danube: The locks Iron Gate I (river km 942.90) and Iron Gate II (river km 863.70/ 862.85) each have two lock chambers which are 310 metres long and 34 metres wide, located on the right bank and the left bank. The lock chambers on the right bank (Djerdap I and II) are maintained and run by Serbia, while those on the left bank (Portile de Fier I and II) are maintained and run by Romania.

Lock

 Country

River-km

Lock chambers
L x W (m) | No.

Bad Abbach

   DE

  2397.17

     190 x 12 | 1

Regensburg

   DE

  2379.68

     190 x 12 | 1

Geisling

   DE

  2354.29

     230 x 24 | 1

Straubing

   DE

  2324.13

     230 x 24 | 1

Kachlet

   DE

  2230.60

     230 x 24 | 2

Jochenstein

 DE/AT    

  2203.33

     230 x 24 | 2

Aschach

   AT

  2162.67

     230 x 24 | 2

Ottensheim-Wilhering

   AT

  2146.82

     230 x 24 | 2

Abwinden-Asten

   AT

  2119.54

     230 x 24 | 2

Wallsee-Mitterkirchen

   AT

  2095.06

     230 x 24 | 2

Ybbs-Persenbeug

   AT

  2060.42

     230 x 24 | 2

Melk

   AT

  2038.06

     230 x 24 | 2

Altenwörth

   AT

  1980.11

     230 x 24 | 2

Greifenstein

   AT

  1949.20

     230 x 24 | 2

Freudenau

   AT

  1921.05

     275*x 24 | 2

Gabcíkovo

   SK

  1819.15

     275 x 34 | 2

Ðjerdap/Portile de Fier I

 RS/RO

   942.95

     310*x 34 | 2

Ðjerdap/Portile de Fier II      

 RS/RO

   863.70

     310*x  34 | 2

 * The Iron Gate I and II lock chambers (RS/RO) as well as the right lock chamber at Freudenau (AT) all feature a double-chamber layout.

Locks on the Danube-Black Sea Canal

In order to accommodate the different water levels on the Danube and the Black Sea, the Danube-Black Sea Canal has two lock facilities, each with two chambers. The first is at Cernavodă close to where it branches off from the Danube (canal-km 60.30), the second is closer to the Black Sea at the beginning of the canal at Agigea (canal-km 1.90). All of the lock chambers are 310.00 metres long and 25.00 metres wide.  

The northern arm of the canal (the Poarta Albă-Midia Năvodari Canal) also has two lock facilities. One is located at its beginning near the Midia-Năvodari refinery (canal-km 1.50), and the second is situated at canal-km 11.50 near Ovidiu. Both facilities feature two lock chambers of 145.00 metres in length and 12.50 metres width.

Locks on the Main-Danube Canal

Each of the locks at the sixteen dams along the Main-Danube Canal has one lock chamber with a usable length of 190.00 metres and a width of 12.00 metres. The sixteen locks are remote-controlled by four remote control centres.

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Contact
Ulf Meinel



Tel: +43 504321 1625

Last change:
24. 01. 2019

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